Datasheet SA9602FPA, SA9602FSA, SA9602JPA, SA9602JSA Datasheet (SAMES)

PRELIMINARY

sames

SA9602F/SA9602J

SINGLE PHASE BIDIRECTIONAL POWER/ENERGY

METERING IC WITH INSTANTANEOUS PULSE OUTPUT

FEATURES

■ Performs bidirectional power and

energy measurement

■ Meets the IEC 521/1036 Specification

requirements for Class 1 AC Watt hour
meters

■ Protected against ESD

■

Total power consumption rating below
25mW

■ Adaptable to different types of current

sensors

■ Operates over a wide temperature range

■ Precision voltage reference on-chip

DESCRIPTION

The SAMES SA9602F is an enhancement
of the SA9102F, as no external capacitors
are required for the A/D converters. The
SA9602J is an enhancement of the
SA9102H.

The SAMES SA9602F and SA9602J Single
Phase bidirectional Power/Energy metering
integrated circuits generate a pulse rate
output, the frequency of which is proportional
to the power consumption. Both devices
perform the active power calculation.

The method of calculation takes the power
factor into account.

Energy consumption is determined by the
power measurement being integrated over
time.

These innovative universal single phase
power/energy metering integrated circuits
are ideally suited for energy calculations in
applications such as residential municipal
metering and factory energy metering and
control.

The SA9602F and SA9602J integrated
circuits are available in both 14 and 20 pin
dual-in-line plastic (DIP-14/DIP-20), as well

as 20 pin small outline (SOIC-20) package
types.

Note that the 20 pin SA9602J is a direct
replacement for the SA9102H. The
SA9602H has a higher output pulse rate
than the SA9102H.

PIN CONNECTIONS

IIN
IIP
VREF
TEST

V

DD

OSC2
OSC1

1
2
3
4
5
6
7

DR-01276

14
13
12
11
10

9
8

GND
IVP

TEST2
FMO

V

SS

DIR
FOUT1

Package: DIP-14

7132 PDS039-SA9602F-00A REV.A 23-07-97

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SA9602F/SA9602J

POWER

INTEG-

RATO R

VOL TAGE

REF.

OSC

ANALOG

SIGNAL

PROCE-

SSING

GND

IV P

DR-01278

VREF

OSC 1

TEST

IIP

IIN

TEST2

OSC 2

TI MI NG

FM O

V

POWER

TO

FREQUENCY

DDVDIR

FOU T

SS

PIN CONNECTIONS

BLOCK DIAGRAM

1

IIN

2

IIP
VREF

3
4

TP4

5

TP5

6

TP6

7

TEST
V

8

DD

9

TP9

10

OSC2

D R -0 1277

Package: DIP-20

GND

20
19

IVP

18

TP17

17

TEST2

16

TP16

15

FMO

V

14
13

DIR

12

FOUT

11

OSC1

SOIC-20

SS

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SA9602F/SA9602J

ABSOLUTE MAXIMUM RATINGS*

Parameter Symbol Min Max Unit

Supply Voltage VDD -V
Current on any pin I
Storage Temperature T
Operating Temperature T

PIN

STG

O

SS

-0.3 6.0 V

-150 +150 mA

-40 +125 °C

-40 +85 °C

* Stresses above those listed under “Absolute Maximum Ratings” may cause permanent

damage to the device. This is a stress rating only. Functional operation of the device
at these or any other condition above those indicated in the operational sections of this
specification, is not implied. Exposure to Absolute Maximum Ratings for extended
periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VDD = 2.5V, VSS = -2.5V, over the temperature range -10°C to +70°C#, unless otherwise
specified.)

Parameter Symbol Min Typ Max Unit Condition

Operating temperature

#

range
Supply Voltage: Positive V
Supply Voltage: Negative V
Supply Current: Positive I
Supply Current: Negative I

T

-25 +85 °C

O

2.25 2.75 V

DD

-2.75 -2.25 V

SS

DD

SS

56mA

56mA
Current Sensor Inputs (Differential)
Input Current Range I

II

Voltage Sensor Input (Asymmetrical)
Input Current Range I

IV

Pins FOUT, DIR
Output Low Voltage V
Output High Voltage V

Pulse Rate FOUT f

Pulse Width tp t

OL

OHVDD

P

PP

t

pn

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-25 +25 µA Peak value

-25 +25 µA Peak value

VSS+1 V IOL = 5mA

-1 V IOH = -2mA

0 64 Hz Specified linearity
0 180 Hz Min and max limits

1.1 ms Positive energy flow

3.4 ms Negative energy flow

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SA9602F/SA9602J

ELECTRICAL CHARACTERISTICS (Continued)

(VDD = 2.5V, VSS = -2.5V, over the temperature range -10°C to +70°C#, unless otherwise
specified.)

Parameter Symbol Min Typ Max Unit Condition

Pin VREF With R = 24kΩ

Ref. Current -I
Ref. Voltage V

R
R

45 50 55 µA connected to V

1.1 1.3 V Referred to V

SS

Oscillator Recommended crystal:

TV colour burst crystal f = 3.5795 MHz

#

Extended Operating Temperature Range available on request.

PIN DESCRIPTION

14 Pin 20 Pin Designation Description

14 20 GND Ground
5 8 V

10 14 V

DD

SS

Positive Supply Voltage

Negative Supply Voltage
13 19 IVP Analog input for Voltage
1 1 IIN Inputs for current sensor
2 2 IIP

3 3 VREF Connection for current setting resistor

4 7 TEST Test Pin. Tied to VSS for protection against HV

transients and noise
12 18 TEST2 Test Pin. May be left unconnected or tie to Vss

7 11 OSC1 Connections for crystal or ceramic resonator

6 10 OSC2 (OSC1 = Input ; OSC2 = Output)

8 12 FOUT Pulse rate output

9 13 DIR Direction indication output

11 15 FMO Rising edge of mains frequency

4 TP4 Test Pins (Leave unconnected)
5 TP5
6 TP6
9 TP9

16 TP16
17 TP17

SS

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SA9602F/SA9602J

FUNCTIONAL DESCRIPTION

The SA9602F and SA9602J are CMOS mixed signal Analog/Digital integrated circuits,
which perform power/energy calculations across a power range of 1000:1, to an overall
accurancy of better than Class 1.

The integrated circuits include all the required functions for 1-phase power and energy
measurement such as two oversampling A/D converters for the voltage and current sense
inputs, power calculation and energy integration. Internal offsets are eliminated through
the use of cancellation procedures. These devices generate pulses, the frequency of
which is proportional to the power consumption. The pulse rate follows the instantaneous
power consumption measured. Direction information is also provided.

A voltage zero crossover signal, relevant to the positive going half cycle, is available on
pin FMO. This signal can be used to sychronise circuit breaker switching.

1. Power Calculation

In the Application Circuit (Figure 1), the voltage drop across the shunt will be between
0 and 16mV
converted to a current of between 0 and 16µA

(0 to 80A through a shunt resistor of 200µΩ). This voltage is

RMS

, by means of resistors R1 and R2.

RMS

The current sense input saturates at an input current of ±25µA peak.
For the voltage sensor input, the mains voltage (230VAC) is divided down through

a divider to 14V

. The current into the A/D converter input is set at 14µA

RMS

RMS

at

nominal mains voltage, via resistor R4 (1MΩ).
In this configuration, with a mains voltage of 230V and a current of 80A, the output

frequency of the SA9602F and SA9602J power meter chip at FOUT is 64Hz. In this
case 1 pulse will correspond to an energy consumption of 18.4kW/64Hz = 287.5Ws.

2. Analog Input Configuration

The input circuitry of the current and voltage sensor inputs are illustrated below.
These inputs are protected against electrostatic discharge through clamping diodes.
The feedback loops from the outputs of the amplifiers AI and AV generate virtual

shorts on the signal inputs. Exact duplications of the input currents are generated
for the analog signal processing circuitry.

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SA9602F/SA9602J

D

S

I

C

S

I

D

P

S

S

URRENT
ENSOR

NP UTS

V O LTA G E

ENSOR

NPUT

V

DD

IIP

V

SS

DDV

IIN

SSV

V

DD

IV P

V

SS

A

I

A

V

R -00908

GN D

3. Electrostatic Discharge (ESD) Protection

The SA9602F and SA9602J integrated circuit's inputs/outputs are protected against
ESD

4. Power Consumption

The power consumption rating of the SA9602F and SA9602J integrated circuits is
less than 25mW.

5. Pulse Output Signals

The calculated power is divided down to a pulse rate of 64Hz, for rated conditions on
FOUT for both the SA9602F and SA9602J.

The format on the pulse output signal, which provides power/energy and direction
information, is the only difference between the SA9602F and SA9602J devices.

The direction of the energy flow is defined by the mark/space ratio in the SA9602F,
while the pulse width defines the direction on the SA9602J.

Waveform on FOUT

o s it iv e E n e rg y F l ow

A96 02F

A9 602J

t

pp

t

pp = 1.1ms

t

pp

N e ga t iv e Energy Flow

t

pn

t

pn = 3.4ms

t

pn

Waveform on DIR

R-00909

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SA9602F/SA9602J

F

D

I

The diagram below shows the behavior of the direction indication, DIR, when energy
reversal takes place. The timing period for the DIR signal to change state, t

DIR

, will
be defined by the time it takes for the integrater to count down from its value at the
time of energy reversal. This is determined by the energy consumption rate.

t

V

IR

DR - 01283

t

DIR

t

t

The square wave signal on FMO indicates the polarity of the mains voltage.

V

t

MO

t

t

MAIN S

D R -01 284

Due to comparator offsets, the FMO low to high transition can occur within a range
as shown above. The time between succesive low to high transitions will be equal
to the mains voltage period.

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SA9602F/SA9602J

TYPICAL APPLICATIONS

In the Application Circuits (Figures 1 and 2), the components required for power metering
applications, are shown.

In Figure 1, a shunt resistor is used for current sensing. In this application, the circuitry
requires a +2.5V, 0V, -2.5V DC supply.

In the case of Figure 2, when using a current transformer for current sensing, a +5V, 0V
DC supply is sufficient.

The most important external components for the SA9602F and SA9602J integrated
circuits are:

R2, R1 and RSH are the resistors defining the current level into the current sense input. The
values should be selected for an input current of 16µA

into the SA9602F and SA9602J,

RMS

at maximum line current.
Values for RSH of less than 200µΩ should be avoided.
R1 = R2 = (IL/16µA
Where I

L

)* RSH/2

RMS

= Line current

RSH = Shunt resistor/termination resistor

R3, R6 and R4 set the current for the voltage sense input. The values should be selected
so that the input current into the voltage sense input (virtual ground) is set to 14µA

RMS

R7 defines all on-chip bias and reference currents. With R7 = 24kΩ, optimum conditions
are set. R7 may be varied within ±10% for calibration purposes. Any change to R7 will affect
the output quadratically (i.e.: R7 = +5%, fP = +10%).

The formula for calculating the output frequency is given below:
f = 11.16

FOUTX

*

3.58MHz I

FOSC * II .I

*

V

2

R

Where FOUTX = Normal rated frequency (64Hz)

.

FOSC = Oscillator frequency (2MHz ...... 4MHz)

I

I

I

V

I

R

= Input current for current input (16µA
= Input current for voltage input (14µA

RMS

RMS

= Reference current (typically 50µA)

at rated)
at rated)

XTAL is a colour burst TV crystal (f = 3.5795 MHz) for the oscillator. The oscillator
frequency is divided down to 1.7897 MHz on-chip, to supply the digital circuitry and the
A/D converters.

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SA9602F/SA9602J

Figure 1: Application Circuit using a Shunt Resistor for Current Sensing.

NC

6

4

5

IC-2

2

3

1

R6

R11

R4

R1

R2

R3

13

14

1

2

LED

11

12

3

4

IC-1

9

10

5

6

NC

R8

8

C10

DR -01280

C15

7

C9

XTA L

ZD1

R7

R9

D1

ZD2

C13

R10

C14

D2

R5

C11

RSH

LOA D

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SU PPLY

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SA9602F/SA9602J

Parts List for Application Circuit: Figure 1

Item Symbol Description Detail

1 IC-1 SA9602F or SA9602J DIP-14
2 IC-2 Optocoupler 4N35 DIP-6
3 D1 Diode, Silicon, 1N4148
4 D2 Diode, Silicon, 1N4148
5 ZD1 Diode, Zener, 2.4V, 200mW
6 ZD2 Diode, Zener, 2.4V, 200mW
7 XTAL Crystal, 3.5795MHz Colour burst TV
8 R1 Resistor, 1% metal Note 1

9 R2 Resistor, 1% metal Note 1
10 R3 Resistor, 390k, (230VAC) 1%, metal
11 R4 Resistor, 1M, 1/4W, 1%, metal
12 R5 Resistor, 470Ω, 2W, 5%, carbon
13 R6 Resistor, 24k, 1/4W, 1%, metal
14 R7 Resistor, 24k, 1/4W, 1%, metal
15 R8 Resistor, 680Ω, 1/4W, 1%
16 R9 Resistor, 680Ω, 1/4W, 1%
17 R10 Resistor, 680Ω, 1/4W, 1%
18 R11 Resistor, 2.2K, 1/4W, 1%
19 C9 Capacitor, 100nF
20 C10 Capacitor, 100nF
21 C11 Capacitor, 0.47µF, 250VAC, polyester
22 C13 Capacitor, 100µF
23 C14 Capacitor, 100µF
24 C15 Capacitor, 820nF Note 2
25 RSH Shunt Resistor Note 3
26 LED Light Emitting Diode

Note 1: Resistor (R1 and R2) values are dependant upon the selected value of RSH.
Note 2: Capacitor (C15) to be positioned as close to Supply Pins (VDD & VSS) of IC-1 as

possible.

Note 3: See TYPICAL APPLICATIONS when selecting the value of RSH.

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SA9602F/SA9602J

Figure 2: Application Circuit using a Current Transformer for Current Sensing.

FOU T

DIR

R6

FM0

C11

R4

14

12

11

13

8

10

9

0V

C9

C10

R3

IC-1

1

R1

RSH

5

4

2

3

7

6

XTAL

R7

R2

R2

R8

R9

=

RSH = TERM INATIO N RESISTO R FO R CURRENT T RANSF O RM ER

R1

5V

CT

2.4V TO 2.6V DC

DR-01281

L

LOA D

N

SUPPLY

sames

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SA9602F/SA9602J

Parts List for Application Circuit: Figure 2

Item Symbol Description Detail

1 IC-1 SA9602F and SA9602J DIP-14

2 XTAL Crystal, 3.5795MHz Colour burst TV

3 RSH Resistor Note 1

4 R1 Resistor, 1%, metal Note 2

5 R2 Resistor, 1%, metal Note 2

6 R 3 Resistor, 390k, (230VAC), 1%, metal

7 R4 Resistor, 1M, 1/4W, 1%, metal

8 R6 Resistor, 24k, 1/4W, metal

9 R7 Resistor, 24k, 1/4W, 1%, metal
10 R8 Resistor, 2.2k, 1/4W, 1%, metal
11 R9 Resistor, 2.2k, 1/4W, 1%, metal
12 C 9 Capacitor, 820nF Note 3
13 C10 Capacitor, 100nF
14 C11 Capacitor Note 4
15 CT Current transformer

Note 1: See TYPICAL APPLICATIONS when selecting the value of RSH.
Note 2: Resistor (R1and R2) values are dependant upon the selected value of RSH.
Note 3: Capacitor (C9) to be positioned as close to Supply Pins (VDD & VSS) of IC-1,

as possible.

Note 4: Capacitor (C11) selected to minimize phase error introduced by current

transformer (typically 1.5µF).

ORDERING INFORMATION

Part Number Package

SA9602FPA DIP-14
SA9602FPA DIP-20
SA9602FSA SOIC-20
SA9602JPA DIP-14
SA9602JPA DIP-20
SA9602JSA SOIC-20

Note: When ordering, the Package Option must be specified along with the Part

Number.

12/14

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Notes:

SA9602F/SA9602J

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SA9602F/SA9602J

Disclaimer: The information contained in this document is confidential and proprietary to South African

Micro-Electronic Systems (Pty) Ltd ("SAMES") and may not be copied or disclosed to a third party, in whole
or in part, without the express written consent of SAMES. The information contained herein is current as of
the date of publication; however, delivery of this document shall not under any circumstances create any
implication that the information contained herein is correct as of any time subsequent to such date. SAMES
does not undertake to inform any recipient of this document of any changes in the information contained herein,
and SAMES expressly reserves the right to make changes in such information, without notification,even if such
changes would render information contained herein inaccurate or incomplete. SAMES makes no representation
or warranty that any circuit designed by reference to the information contained herein, will function without
errors and as intended by the designer.

Any sales or technical questions may be posted to our e-mail address below:
[e-mail]

For the latest updates on datasheets, please visit our web site:
http://www.sames.co.za

South African Micro-Electronic Systems (Pty) Ltd

P O Box 15888, 33 Eland Street,
Lynn East, 0039 Koedoespoort Industrial Area,
Republic of South Africa, Pretoria,

Republic of South Africa

Tel: [phone] Tel: Int [phone]
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